Our rectifiers are dedicated to hydrogen production applications using PEM or Alkaline technologies. With more than 2000 power converters installed worldwide and 70 years of experience in power conversion Comeca is involved in many sectors to ensure reliable, safe and available power conversion.
Our rectifiers are dedicated to hydrogen production applications using PEM or Alkaline technologies. With more than 2000 power converters installed worldwide and 70 years of experience in power conversion Comeca is involved in many sectors to ensure reliable, safe and available power conversion.
A range of rectifiers dedicated to the water electrolysis process.
We design power conversion solutions to convert AC power according to your needs for projects ranging from 20kW to multiple 5mW bricks.
With many reference customers, our power rectifiers feature high efficiency, high power factor and low ripple or residual harmonics.
They are also equipped with a real-time control system and remote monitoring for predictive maintenance.
To offer a flexible, compact solution adapted to the needs of PEM or alkaline electrolysers, we have created and industrialised a range of rectifiers called ALLHYDRE®.
A range of rectifiers dedicated to the water electrolysis process.
We design power conversion solutions to convert AC power according to your needs for projects ranging from 20kW to multiple 5mW bricks.
With many reference customers, our power rectifiers feature high efficiency, high power factor and low ripple or residual harmonics.
They are also equipped with a real-time control system with remote monitoring for predictive maintenance.
To offer a flexible, compact solution adapted to the needs of PEM or alkaline electrolysers, we have created and industrialised a range of rectifiers called ALLHYDRE®.
From 20kW to 1MW
Allhydre
The rectifier is directly supplied by a delivery and transformer station which preferably contains a dry MV-LV transformer. Allhydre is a modular solution allowing great flexibility in terms of output current and voltage (up to 750V / 24,000 A).
The solution consists of a modular rectifier stage, a DC-DC bus, a buck stage to adapt the output voltage and a filter to improve the signal quality.
Allhydre is supplied with 400VAC – 50-60hz, which is suitable for the output voltages of standardised delivery and transformer stations.
The rectifier footprint is limited to the minimum required and its dimensions are easily adapted to containerised solutions.
Thanks to its excellent efficiency, it produces little heat loss, limiting the temperature rise in the room.
from 20kW to 1MW
Allhydre
The rectifier is directly supplied by a delivery and transformer station which preferably contains a dry MV-LV transformer. Allhydre is a modular solution allowing great flexibility in terms of output current and voltage (up to 750V / 24,000 A).
The solution consists of a modular rectifier stage, a DC-DC bus, a buck stage to adapt the output voltage and a filter to improve the signal quality.
Allhydre is supplied with 400VAC – 50-60hz, which is suitable for the output voltages of standardised delivery and transformer stations.
The rectifier footprint is limited to the minimum required and its dimensions are easily adapted to containerised solutions.
Thanks to its excellent efficiency, it produces little heat loss, limiting the temperature rise in the room.
from 1MW to 5MW and above
Allhydre
Power conversion for hydrogen production currently uses thyristor technology for its reliability and economic performance.
The power converter command control is ensured by a real time system with a calculation cycle of 100µs. This digital electronic module, which can be remotely controlled, ensures the regulation and limits the level of harmonics.
The power modules cooling is carried out by forced ventilation or liquid cooling with an exchanger depending on the preferred configuration for the project.
The choice of transducers for the control loop allows a measurement accuracy close to 1% for shunts to 0.2% for hall effect sensors.
Each thyristor or diode is powered directly to avoid the cost and maintenance disadvantages associated with a parallel-paired architecture.
Considering the power required by the industrial production, the High Voltage private distribution requires an adapted filtering.
We propose to carry out an HV network study of the installation concerning harmonics and disturbances to determine the filtering to be implemented.
from 1MW to 5MW and above
Allhydre
Power conversion for hydrogen production currently uses thyristor technology for its reliability and economic performance.
The power converter command control is ensured by a real time system with a calculation cycle of 100µs. This digital electronic module, which can be remotely controlled, ensures the regulation and limits the level of harmonics.
The power modules cooling is carried out by forced ventilation or liquid cooling with an exchanger depending on the preferred configuration for the project.
The choice of transducers for the control loop allows a measurement accuracy close to 1% for shunts to 0.2% for hall effect sensors.
Each thyristor or diode is powered directly to avoid the cost and maintenance disadvantages associated with a parallel-paired architecture.
Considering the power required by the industrial production, the High Voltage private distribution requires an adapted filtering.
We propose to carry out an HV network study of the installation concerning harmonics and disturbances to determine the filtering to be implemented.
Depending on the power and technology used, our rectifiers are cooled by forced convection or by water circuit and exchanger.
Note that forced convection cooling requires a reserve of headroom between the top of the product and the roof of the container or building. This is then cooled by an air conditioning system or by a ventilation system.
Depending on the power and technology used, the control can be either analogue or digital.
The current is regulated to follow the customer’s set point which can be local or remote. The voltage is simply monitored. The temperature of the rectifier and transformer is monitored.
Digital control regulates the current and/or voltage. Control laws are tailored to the application and load, power on and power off are gradually varied and optimised to ensure rectifier integrity.
Maximise the electrolysis process (hardest possible DC signal)
Depending on the power and technology used, our rectifiers are cooled by forced convection or by water circuit and exchanger.
Note that forced convection cooling requires a reserve of headroom between the top of the product and the roof of the container or building. This is then cooled by an air conditioning system or by a ventilation system.
Depending on the power and technology used, the control can be analogue or digital.
The current is regulated to follow the customer’s set point which can be local or remote. The voltage is simply monitored. The temperature of the rectifier and transformer is monitored.
Digital control regulates the current and/or voltage. Control laws are tailored to the application and load, power on and power off are gradually varied and optimised to ensure rectifier integrity.
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